The function of the tunnel light intensity detector is to create a good working visual environment quality inside the tunnel and optimize the driving transition experience. [Model recommendation: TH-DW1, IoT integrated device, customized service supported by Yunjing Tianhe]In tunnel traffic scenarios, the comfort and safety of the driver's visual experience directly affect road traffic efficiency and accident rates. When a vehicle suddenly enters a dim tunnel from a bright outside, the human eye needs several seconds to adapt to the low light environment. During this period, blurred vision can easily lead to operational errors; When driving out of the tunnel, sudden changes in strong light may cause brief glare, increasing the risk of collision. The tunnel light intensity detector, as the "intelligent adjuster" of the lighting system, captures the real-time light intensity, color temperature, and changing trends inside and outside the tunnel through high-precision optical sensors deployed at the entrance, interior, and exit of the tunnel. Its core function is to create a dynamic and balanced visual environment: automatically adjusting the tunnel entrance to enhance lighting and internal gradient lighting based on external light, eliminating the "black hole effect" and "white hole effect"; At the same time, through a soft light transition design, it helps the driver's eyes gradually adapt to changes in brightness, reducing visual fatigue and stress reactions. This intelligent regulation based on real-time light intensity data not only optimizes the driving transition experience, but also reduces the risk of traffic accidents caused by visual adaptation barriers from the source, building a light perception protection barrier for tunnel traffic safety.

Product Overview:

Highway tunnels are special sections of highways, with narrow spatial environments, large variations in lighting, and unclear visibility as a special tubular structure. Unlike the bright and spacious roads outside the tunnel, the process of vehicles entering and passing through the tunnel is a process of entering from the bright into the black hole, and then moving from the black hole to the bright. The process of transitioning from light to dark or from dark to light requires an adaptation process. During this adaptation process, drivers find it difficult to identify road targets or objects inside the tunnel, resulting in visual psychological barriers or obstacles that make driving appear unsafe. The purpose of tunnel lighting is to create a good working visual environment quality inside the tunnel, ensuring that vehicles traveling during the day and night can safely approach, pass through, and pass through the tunnel at the designed speed.

tunnellight intensityDetector is an efficient lighting control system designed to address visual adaptation issues caused by differences in brightness and darkness inside and outside tunnels. In response to the requirements for lighting control in domestic highway tunnels, our company has developed research and development to meet market demands了tunnelIlluminance detector inside the cave and brightness detector outside the caveIts overall design is versatile and meets the requirements of harsh outdoor working environments, with high reliability and low maintenance，The most advanced microprocessor technology, WAN fully digital operation, easy installation and debugging. This product aims to improve the scientific and energy efficiency of tunnel lighting by accurately measuring the brightness of the tunnel entrance and automatically adjusting the internal lighting, ensuring driving safety requirements and energy-saving effects, while complying with the requirements of the "Design Specification for Highway Tunnel Ventilation and Lighting".

Application Scenario:

1. Monitoring and adjustment: The brightness detector outside the tunnel is used in conjunction with the illuminance detector inside the tunnel. The detector outside the tunnel monitors the real-time changes in the intensity of the light outside the tunnel and adjusts the lighting intensity inside the tunnel to ensure a smooth transition of light inside and outside the tunnel, reducing visual impact for drivers entering and exiting the tunnel and improving driving safety.

2. Energy saving optimization: dynamically adjust the lighting power inside the tunnel based on the natural light intensity outside the tunnel, avoiding excessive lighting during the day or insufficient lighting at night, achieving precise allocation of lighting resources, reducing tunnel operating costs, and achieving energy-saving goals.

3. Safety warning: When the weather outside the tunnel suddenly drops or other abnormal situations are detected, the emergency lighting plan can be activated in advance, and variable information boards and other devices can be used to remind drivers to slow down and ensure driving safety.

Product Features:

1. There is a good linear relationship between brightness and photocurrent，And it can respond to changes in lighttimelyResponse.

2. According to the CIE specified human visual spectrum curve, a specially designed high-efficiency filter is used for calibration, which conforms to the characteristics of human visual perception

3、equipmentinternalEquipped with heating elements and cooling fans, the device is kept at its maximum operating temperature, effectively reducing the temperatureFactors affect accuracyofinfluence.

4. Equipped with automatic gain control technology to improve accuracy in low light and strong light environments.

5The device comes with status display, fault alarm, and data storage functions, making it easy to debug and maintain.

6A large range, comprehensive and durable optical probe.

7Multiple output modes, convenient data collection.

8Low power design ensures sustained performance while saving energy

9Specially designed for the special harsh environmental conditions of tunnels, ensuring long-term stable operation

10Lightning protection measures have been taken, and the communication interface and power interface have lightning protection design, greatly reducing the damage that may be caused by lightning strikes

Technical parameters:

Measurement range: 0~10000cd/m2

Measure angle：vertical≥20 ºlevel≥20º

measurement accuracy：±0.1 cd/m2

communication interface：

1 RS485 digital output interface;

14-20mA analog output interface;

1-channel relay switch alarm output interface.

power consumptionRated 5W, maximum 20W (heating)

Load impedance:≤500Ω

power supply voltage：90V-305VAC (47-63Hz)

Operating Temperature：-50℃～+85℃

Operating Humidity：0～100%RH

Protection level: IP68

Working life: ≥ 50000 hours

Installation method: Column installation